import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import User from '../components/User.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    { path: '/home', redirect: '/welcome' },
    {
      path: '/home',
      component: Home,
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: User },
        { path: '/rights', component: Rights },
        { path: '/roles', component: Roles },
        { path: '/categories', component: Cate }
      ]
    }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to:将要访问的路径;from:代表从哪个路径跳转而来;next():放行函数;next('/login'):强制跳转
  // 访问login则直接放行
  if (to.path === '/login') return next()
  // 不是访问login则获取token，有token放行，没有则强制跳转回login
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
